When using fish as the user shell, /etc/profile does not get sourced

[jonas-schievink]

This used to work fine in 0.18.1, but broke in 0.19.0.

Looking at the Xsession script, it does look like fish will end up not sourcing /etc/profile:

sddm/data/scripts/Xsession

Lines 41 to 46 in e93bf95

	*/fish)
	xsess_tmp=`mktemp /tmp/xsess-env-XXXXXX`
	$SHELL --login -c "/bin/sh -c 'export -p' > $xsess_tmp"
	. $xsess_tmp
	rm -f $xsess_tmp
	;;

...though I'm not sure why it worked in 0.18.1.

(this was tested with the Arch Linux packages)

[Vogtinator]

See #1059, that change was intentional.

[jonas-schievink]

Shouldn't #879 be reopened then?